Biosensor

Abstract

A biosensor includes a substrate; a working electrode including a working electrode layer formed on the substrate and an enzyme reaction layer formed on the working electrode layer to cover the working electrode layer; a reference electrode formed on the substrate to be spaced apart from the working electrode; and an insulation barrier rib separating the working electrode and the reference electrode on the substrate. The biosensor has a wide measurement range, excellent sensitivity, and reduced dispersion of measured values.

1 . A biosensor comprising:
 a substrate;   a working electrode including a working electrode layer formed on the substrate and an enzyme reaction layer formed on the working electrode layer to cover the working electrode layer;   a reference electrode formed on the substrate to be spaced apart from the working electrode; and   an insulation barrier rib separating the working electrode and the reference electrode on the substrate.   
     
     
         2 . The biosensor according to  claim 1 , wherein the insulation barrier rib defines regions of the working electrode and the reference electrode. 
     
     
         3 . The biosensor according to  claim 1 , wherein a height of the insulation barrier rib is higher than heights of the working electrode and the reference electrode. 
     
     
         4 . The biosensor according to  claim 1 , wherein a surface area ratio of the working electrode layer and the enzyme reaction layer is 1:1.1 to 1:2.1. 
     
     
         5 . The biosensor according to  claim 4 , wherein the surface area ratio of the working electrode layer and the enzyme reaction layer is 1:1.1 to 1:1.8. 
     
     
         6 . The biosensor according to  claim 1 , wherein the biosensor is manufactured by forming the working electrode layer and the reference electrode on the substrate at a predetermined interval, forming the insulation barrier rib separating the working electrode layer and the reference electrode, and forming the enzyme reaction layer on the working electrode layer to cover the working electrode layer. 
     
     
         7 . The biosensor according to  claim 1 , wherein the biosensor is used to measure a concentration of lactic acid, glucose, cholesterol, ascorbic acid, alcohol, or glutamic acid. 
     
     
         8 . The biosensor according to  claim 7 , wherein the biosensor is used to measure the concentration of lactic acid.